Analysis of 1.8THP turbocharged direct injection engine

With the global debut at the Chengdu Auto Show, the all-new Dongfeng Peugeot 508 announced that it will be equipped with a 1.8THP turbocharged direct injection engine for the first time, as the newest achievement under the E-motion strategy, 1.8THP stronger power and more efficient data performance The description of “StrongerThanStronger” couldn’t be more apt. Just like the popular iPhone6 ​​and iPhone6Plus nowadays, the new 508 with 1.8THP and 1.6THP will also meet the power needs of different consumers. In particular, the addition of 1.8THP will undoubtedly expand the power of the new 508 to a new level.
Forward-looking technology is easy to learn
With the continuous improvement of Dongfeng Peugeot’s product system and consumers’ demand for power enhancement, a larger-displacement turbocharged engine can improve the power performance of the new 508 Dongfeng Peugeot flagship model and satisfy consumers’ pursuit of passion for driving experience. 1.8THP turbocharged engine compared to 1.6THP turbocharged engine, the increase in displacement brings more surging power. At the same time, its core technology is the same as the 1.6THP engine, including dual-scroll single turbocharger, direct fuel injection and variable valve timing as the key technologies, which not only can bring direct and smooth The driving experience and fuel economy are also remarkable.
1.8THP turbocharged engine adopts Twinscroll twin-scroll single-turbocharge technology, maximum output power 150kw/5500rpm; maximum output torque 250Nm/1400rpm-4000rpm, exceeding the 2.0T level of the benchmark competitive product. This technology can achieve a 7-8% increase in turbine efficiency and a 5% increase in combustion efficiency. The Twinscroll twin-scroll single-turbocharger combines 4-cylinder exhaust 1, 4, 2, and 3 into the turbine together to avoid the air flow turbulence caused by the traditional single-scroll tube, improve the charging efficiency, and have a stronger power performance. At the same time, a smaller size and lighter weight turbine can work faster under the action of full exhaust gas. It can work at 1000 rpm, and the peak torque is burst at 1500 rpm. There is no delay, and the acceleration performance is better at low speeds. , And maintain a strong continuous output.
The in-cylinder direct injection technology of the 1.8THP turbocharged engine optimizes the fuel injection system. The injection pressure reaches 20 MPa, the pressure value is high, the fuel atomization is good, the fuel particles are small, the oil and gas mixture is more complete, and the combustion is more thorough. At the same time, a high-pressure fuel rail with sensors and a fuel injector with damping are used to make fuel injection more precise and stable, improve combustion efficiency, and thereby increase output torque and power.
The CVVT continuously variable intake timing system, all-aluminum alloy lightweight design, lightweight piston assembly, ECU-controlled continuously adjustable displacement oil pump and other fuel-saving technologies are used, as well as electronically controlled thermostats and clutch-type water pumps. The electronic control equipment works together with the STT intelligent start-stop system, and its fuel consumption is better than the mainstream 1.8T level, achieving high environmental protection, meeting the Euro V emission standard and adapting to the Euro VI emission standard.
Reliability, peace of mind
1.8THP turbocharged engine squeezes the best power while still having excellent engine reliability. It has the same technology as the 1.6THP turbocharged engine, and the ** peer technology has passed the test of 2 million 1.6THP turbocharged engine users worldwide, forming the technical characteristics of durability, reliability and strong applicability. The 1.8THP turbocharged engine adopts rigorous technology and rigorous selection of materials, with a design life of up to 240,000 kilometers, and can also start normally at minus 32 degrees.
The 1.8THP turbocharged engine is running like a “Song of Ice and Fire”. Generally, the turbine of a turbocharged engine is affected by high temperature exhaust gas and extremely high speed, and the working environment temperature is high. If the engine is turned off immediately when driving, the cooling water circulation of the entire vehicle will be stopped, and the turbine will be easily damaged under high temperature. The 1.8THP turbocharged engine adopts the double cooling of the supercharged turbo system. In addition to the normal oil lubrication and cooling, there is also an electronic cooling water pump that continues to work with a delay after the engine is stopped to cool the turbo system. It avoids the embarrassing situation that some models cannot be turned off after parking and need to continue cooling.
1.8THP turbocharged engine also adopts embedded cast iron cylinder liner, which has strong heat load resistance, corrosion resistance and friction resistance better than cast aluminum cylinder liner. In addition, the use of special materials and processes such as DLC coating and lightweight aluminum alloy pistons adds to the icing on the cake, further improving the service life of the engine.
The 1.8THP turbocharged engine has the highest efficient power performance, excellent and lasting reliability and performance. As the strong core of the “E-Dynamic Strategy”, the 1.8THP turbocharged engine will be the first to be installed in the new flagship model of Dongfeng Peugeot*, the brand new 508 We will wait and see what kind of driving experience the brand new 508 will bring with its leaps and bounds in power at that time!